Preheat oven to 450 degrees. Cut potatoes into 1/4 inch slices. Brush both sides of potatoes with oil. Place rounds on a baking stone or sheet pan. Bake 20 minutes or until lightly browned. Remove from oven.

Meanwhile, cook bacon until crisp, drain and crumble. In a medium bowl, combine bacon, cheese, and sliced green onions in a bowl and toss together. With a basting brush, brush each potato round with barbeque sauce and sprinkle the cheese mixture on top. Return to the oven. Bake 3-5 minutes until cheese is melted.